/*
 * Copyright (c) 2010, Michael Hengler (developer (at) hengler (dot) de),
 * Nikolaus Moll (developer (at) miblounge (dot) net).
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the Jombi project nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL JOMBI BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.miblounge.jombi.impl.util;

import com.trolltech.qt.core.QSize;
import com.trolltech.qt.gui.QApplication;
import com.trolltech.qt.gui.QMainWindow;
import com.trolltech.qt.gui.QWidget;

/**
 * Helps getting window border sizes
 * 
 * @author nimoll
 * 
 */
public final class BorderUtil {
	private static boolean isInitialized = false;
	private static int borderWidth = -1;
	private static int borderHeight = -1;
	private static int borderTop = -1;
	private static int borderBottom = -1;
	private static int borderLeft = -1;
	private static int borderRight = -1;

	private BorderUtil() {}

	private static void initialize() {
		if (isInitialized) {
			return;
		}
		isInitialized = true;

		final QWidget activeWidget = QApplication.activeWindow();

		final QMainWindow window = new QMainWindow();

		final int w = 300;
		final int h = 200;
		window.setGeometry(-2 * w, -2 * h, w, h);
		window.show();

		final QSize clientSize = window.size();
		final QSize windowSize = window.frameSize();

		window.close();
		window.dispose();

		QApplication.setActiveWindow(activeWidget);

		borderWidth = windowSize.width() - clientSize.width();
		borderHeight = windowSize.height() - clientSize.height();

		borderLeft = borderWidth / 2;
		borderRight = borderWidth / 2;

		borderBottom = borderLeft;
		borderTop = borderHeight - borderBottom;
	}

	public static int getBorderWidth() {
		initialize();
		return borderWidth;
	}

	public static int getBorderHeight() {
		initialize();
		return borderHeight;
	}

	public static int getBorderTop() {
		initialize();
		return borderTop;
	}

	public static int getBorderBottom() {
		initialize();
		return borderBottom;
	}

	public static int getBorderLeft() {
		initialize();
		return borderLeft;
	}

	public static int getBorderRight() {
		initialize();
		return borderRight;
	}

}
